These regions, in order of size, are: The Eastern Anatolia Region (21%), The Central Anatolia Region (20%), The Black Sea Region (18%), The Mediterranean Region (15%), The Aegean Region (10%), The Marmara Region (8.5%) and The Southeastern Anatolia Region (7.5%).

Turkey has been classified into seven geographical regions in terms of natural, demographic and economic aspects since the First Turkish Geography Congress held in 1941.